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17.4. (B) Main Circuit
SCHEMATIC DIAGRAM - 3
: +B SIGNAL
MAIN CIRCUIT
: -B SIGNAL
SA-AK340E/EB/EG MAIN CIRCUIT
1/4
C2112
1
C2114
C2212
0
1
R2112
3.3K
C2252
10
C2214
R2111
0
2.2K
C2254
R2211
0
2.2K
W2501
0
PB_L
14
PB_R
13
GND
12
REC_IN_L
11
REC_IN_R
10
TO
+B
9
DECK
REC_H
CIRCUIT
8
(CN1001) ON
MO+B
7
SCHEMATIC
MO_GND
DIAGRAM-7
6
NC
5
DECK1_H
4
NC
3
MOTOR
2
NC
1
CN2803
R2121
3.3K
TUNER RCH
: FM/AM SIGNAL LINE
: TAPE RECORD SIGNAL LINE
: CD SIGNAL LINE
: TAPE PLAYBACK SIGNAL LINE
: MAIN SIGNAL LINE
C2101
1
C2122 1
C2222 1
C2132 1
C2232 10
C2152
1
R2212
3.3K
C2154
0
R2102
3.3K
R2104
27K
R2103
2.2K
R2204
27K
C2201 1
R2202
R2203
3.3K
2.2K
+15V
C2976
MOT_12V
16V10
P_GND
REC[59]
Q2978
B1GDCFJJ0047
REC:ON/OFF CONTROL SWITCH
SW5V
A_GND
Q2980
B1GDCFJJ0047
W2553
SUPPLY CONTROL SWITCH
0
MTR[58]
DECK_H
R2674
47K
R2675
R2301
15K
56
55
54
53
52
51
50
49
48
47
46
45
44
43
IN-L1
1
L-OUT
42
2
IN-R1
NC
41
3
IN-L2
DATA
40
4
IN-R2
CLK
39
5
IN-L3
VCC
38
IC2803
6
IN-R3
R-OUT
37
C1BB00001121
7
IN-L4
POST-VM-R
36
AUDIO SOUND PROCESSOR
T-OUT-R
35
8
IN-R4
9
IN-L5
BASS-R2
34
10
IN-R5
BASS-R1
33
C2161 0.01
11
IN-L6
32
MID-R2
C2261 0.01
12
IN-R6
MID-R1
31
TRE-R
13
GND
30
C2581 16V100
14
REF-IN
NC
29
W2506
0
15 16 17 18 19 20 21 22 23
24
25
26
27
28
C2582
16V100
W2503
0
W2520
0
W2577
R2193
R2194
C2194
0
4.7K
100K
0.15
R2283
100K
C2283
0.047
C2501
R2501
R2503
D2503
1
330K
2.7K
B0ADCC000002
C2503
1
Q2501
B1ABCF000176
LEVEL METER
CONTROL SWITCH
R2504
100
R2502
82K
R2505
0
Q2980
(DECK MOTOR)
63
C2311
R2311
1
470
R2312
10K
R2355
270K
C2401 0.22
R2455
C2402 0.22
R2401
15K
270K
C2272 0.15
C2271 0.15
R2412
C2274 0.01
10K
C2411
C2273 0.01
1
R2411
470
C2583
16V100
R2273
R2271
C2275
D2583
C2588
4.7K
6.8K
3300P
B0BC9R000008
0.1
B1GDCFJJ0047
C2509
C2585
R2585
C2584
R2510
16V33
220P
330K
220P
R2509
220
560
Q2511
C2507
R2508
0.22
1K
R2512
R2511
100K
2.2K
C2511
R2584
R2586
50V2.2
330K
1.2K
N
W2546
0
W2526
0
SA-AK340E / SA-AK340EB / SA-AK340EG
W2511
0
R2701
1K
R
Q2142
B1ABCF000176
AGC CONTROL SWITCH
R2702
1K
R23
56
R2145
R2146
1K
1K
Q2311,Q2411
B1ABGC000005
MUTING SWITCH
R2314
C2312
0
1
Q2311
4
3
2
R2313
100K
C2342
C2704
W2514
IC2804
1
470P
0
C0AABB0001
C2442
IC OP AMP
1
R2413
Q2411
100K
R2414
C2412
5
6
7
0
1
C2413
47P
C2706
R2245
50V1
1K
R2415
56K
R2706
3.3K
D2241
R2246
Q2242
B0ACCK000005
1K
B1ABCF000176
AGC CONTROL SWITCH
R2247
C2245
R2248
100K
16V10
6.8K
Q2511
MUTING CONTROL
R2342
R2
W2513
W2531
0
0
0
R2344
R2
0
Q2341
R2347
R2346
1
3.3K
R2345
1.5K
R2357
100K
W2530
0
R2457
100K
R2445
R2446
10K
3.3K
Q2441
R2442
R2
0
Q2341,Q2441
B1ABGC000005
R2444
R2
0
HEADPHONE MUTING
R2447
1
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